Automatic burglar-alarm system.



L, H. GERMAN.

AUTOMATIC BURGLAR ALARM SYSTEM.

APPLICATION FILED JUNE4. 1914.

1, 141,327. Patented June 1, 1915 lmvemlioz .Loudsfl 69/ mm eyes 6carried by the LOUIS H. GERMAN, OF LOUISVILLE, KENTUCKY.

AUTOMATIC BURGLAR-ALARM SYSTEM;

Specification of Letters Patent.

Patented June 1, 1915.

Application filed June 4, 1914. Serial No. 843,110.

To all whom it may concern Be it known that I, LOUIS H. GERMAN, acitizen of the United States of America, residing at Louisville, in thecounty of Jefferson and State of Kentucky, have invented new and usefulImprovements in Automatic Burglar-Alarm Systems, set forth in thefollowing specification.

This invention relates to improvements in automatic burglar alarmsystems and has particular application to a system whereby a signal maybe given at a distant or remote point in the event of a personattempting to effect an unlawful entry to the protected structure.

In carrying out the present invention, it is my purpose to improve andsimplify the general construction of automatic burglar alarm systems ofthe class described and to provide a system which will embodycomparatively few parts and these so correlated and arranged as toreduce the possibility of derangement to a minimum and furthermore, myimproved system may be installed and maintained at a minimum expense andmay be stored away quickly and conveniently when out of service so thatemployees in the building will be unaware of the existence of theburglar alarm system when the building is open.

With the above and other objects in View, the invention consists in theconstruction, combination and arrangement of parts hereinafter set forthin and falling within the scope of the claim.

In the accompanying drawing; Figure 1 is a diagrammatic view showing myinvention installed in a building and connected with the doors thereof.Fig. 2 is a view in elevation of a snap hook. .Fig. 3 is a similar viewof the screw eye.

Referring now to the drawing in detail, 1, 2 and 3 designate the doorsof a building to be protected, while 4 indicates a box or receptacleconveniently located within the building on the ground floor thereof andpreferably disposed adjacent to one of the walls of the building.Located within the box 4 is a telephone set 5 or any other form ofsignal transmitting apparatus. Secured to each door adjacent to theupper end thereof is a screw eye 6 and secured to the wall of thestructure between the doors 1, 2 and 3 are screw eyes 7 alining with thescrew doors. Passed through the alining screw eyes 6 and 7 is a wire orother flexible element and one end of the wire 8 is provided with a snaphoop 9 adapted to engage the eye 6 in the adjacent door, while connectedto the remaining end of the wire 8 is an elastic cord 10 passed throughan opening 11 in the door of the box 4 and having the lower end thereofconnected with the receiver of the telephone set 5 within the box 4.Also connected with the receiver of the telephone set 5 is one end of anelastic cord 11 extending through an opening 12 in the bottom of the boxand outwardly through an opening in the adjacent wall of the buildingand connected with the outer end of the cord 12 is a snap hook similarto the snap hook 9 adapted co engage an eye, similar to the eyes 6,

secured to the outer surface of the building seen that whenthe wire 8 ispassed through the alining eyes 6 and the snap hook end of the wiresecured to the eye on the adjacent door and the remaining end of thewire connected with the elastic cord 10, a pull will be exerted upon thewire when one or more of the doors is opened, thereby pulling the cord10 and lifting the receiver of the telephone set 5 from the hook so thatthe switch controlled by the receiver hook or arm will be closed,thereby signaling the party in charge of the telephone set connectedwith the set 5. In order to hold the receiver upon the book when thewire 8 is being trained through the alining eyes 6 and 7, the snap hookon the end of the cord 11 is passed through the wall of the building andsecured to the hook in the outer surface of such wall. The person withinthe building may now train the wire through the eyes and leave thebuilding by way of one of the protected doors, as the I pull of the wire8 on the cord 10 will stretch the cord 10 and the action of the cord 10on the receiver be counteracted by the cord 12, thereby holding thereceiver upon the receiver hook. When the party leaves the building hereleases the cord 12 from the hook on the outer wall of the building,therei maybe withdrawn from the eyes and stored away in the box 4 sothat the employees in the building will be unaware of the existence ofthe burglar alarm system.

I claim:

In an automatic burglar alarm system, a closed receptacle, a signalsending instrument in said receptacle, eyes secured to the doors of thebuilding, a wire passed through said eyes, a fizaed connection betweenone end of said Wire and the eye on the adjacent door, an elasticconnection between the remaining end of said Wire and the instrument insaid receptacle, and means adapted to be attached to the outer side ofthe protected structure and connected to said instrument to hold thelatter against operation and detachable from the outer side of thebuilding to release said instrument.

LOUIS H. GERMAN. Witnesses:

WALTER L. PORTER, WILLIAM B. CRAIG.

